Use and Care Manual

First Choice When Quality Matters
NORTH
AMERICA
Plunger Pumps
Operating Instructions and Parts Manual RK Series Pumps
Figure 5
Figure 6
Figure 4
Special Features (continued)
Crankcase: Precision die-cast,
large cooling fi ns and anodized (for
maximum heat dissipation).
Rear Cover: Precision die-cast, O-ring
sealed and bayonet style sight glass for
positive sealing and locking (no threads
to loosen).
Plunger Rods: Stainless steel
construction for strength (no plating to
scrape off), back-up and O-ring plunger
sealing system.
Rod Pins: Precision ground and
hardened steel, oversized for load
disbursement.
Connecting Rods: One-piece special
allow aluminum (3XU51, 3XU60 and
3XU68) or bronze (3XU52, 3XU54,
3XU61and 3XU62) for higher pressure,
oversized for maximum strength, load
disbursement, and life. Heavy pin area
construction, for added load strength.
Crankshaft: Forged, precision ground
and hardened for extremely long life
and durability.
Oil Seals and O-rings: Triple lip oil
seals, long life and much less leak
prone. All are constructed of Buna-
N rubber. The O-rings have stainless
steel garder springs to assure constant
tension on the sealing surface.
Oil Drains: Quantity of two (2). One in
the rear cover and one in the bottom of
the crankcase.
Oil Capacity: 15.5 oz.
Extra Features
Dyno Proven: All pumps are dyno
tested to assure the theoretical design
meets the actual design.
Valve Design: Each pump series has a
valve design that optimizes its highest
effi ciency.
Installation
Direct Drive Electric and Gasoline
Pumps
1. Install the shaft key into the
keyway and apply a light coating
of anti-seize on the
engine shaft.
2. Align the two key
ways and push the
pump completely
onto the engine. (See
Figure 4 & 5)
3. Install all four (4)
bolts and tighten
evenly.
4. Remove the red
shipping oil cap
and install the black
crankcase vent cap.
(See Figure 6)
5. Install the
appropriate
unloader valve and
other accessories.
6. Install the appropriate water inlet
and discharge fi ttings.
7. Connect the water supply hose and
high-pressure discharge hose/spray
gun.
8. Turn on the water supply.
Plunger Pumps
Operating Instructions and Parts Manual RK Series Pumps
First Choice When Quality Matters
NORTH
AMERICA
Pos. Code Description Qty. Pos. Code Description Qty.
2280140 Hollow shaft Ø1  1
2280130 Hollow shaft
Ø1  1
2280590 Hollow shaft
Ø1  1
69 2280600 Hollow shaft Ø1 ⌧ 1
70 1597 Gas engine fl ange F24 1
72 1381850 Washer 8
73 820440 Set screw M6x6 1
75 1080401 Back-up ring 3
2289208 Complete pump head  1
2289209 Complete pump head  1
77 2289221 Complete pump head ⌧ 1
86 1260250 Oil sight glass 1
87 1260430 Snap ring 1
88 1780690 Contrast disc 1
89 1140450 O-Ring Ø20.24x2.62 1
AR64516 Oil 1
OIL CAPACITY - 15 OZ
1 960160 O-Ring Ø17.86x2.62 6
960090 Valve cap - Brass (478 in/lbs)  6
960850 Valve cap - SS (478 in/lbs) ⌧ 6
960090T Valve cap - 1/4” threaded - Brass (478 in/lbs) 1
2 960850T Valve cap - 1/4” threaded - SS (478 in/lbs) 1
3 889052 Complete valve 6
4 880830 O-Ring Ø15.54x2.62 6
880581 Plug 1/4” G - Brass  2
5 1380690 Plug 1/4” G - NP ⌧ 2
6 820510 O-Ring Ø10.82x1.78 2
11 960110 Support ring 3
12 880320 High pressure packing 3
13 1380090 Piston guide 3
14 961240 O-Ring Ø31.47x1.78 3
15 880330 Gasket 3
16 1383130 Oil seal 3
17 850370 Bolt M8x16 (217in/lbs) 8
18 1380050 Closed bearing support 1
19 640030 O-Ring Ø59.99x2.62 2
20 2280240 Bearing 1
21 1382770 Pump housing 1
22 880130 Vented oil cap 1
23 962010 Nut M8 (106 in/lbs) 3
24 962000 Washer Ø8.1 3
25 1380940 Ceramic piston 3
26 1380950 Slinger 3
27 600180 O-Ring Ø7.66x1.78 3
28 1380920 Guiding piston 3
29 1380060 Piston pin 3
1383020 Con rod - Bronze 3
30 1383050 Con rod - Aluminum 3
34 1780510 O-Ring 1
35 1789010 Complete cover 1
36 1343510 Bolt M6x14 (89 in/lbs) 6
1380120 Shim 0.10 mm 1-3
1380130 Shim 0.20 mm 1-3
1380530 Shim 0.25 mm 1-3
40 1382810 Shim 0.05 mm 1-3
42 740290 O-Ring Ø14x1.78 3
43 1980740 Plug 3/8” G - Brass 2
1980740 Plug 3/8” G - Brass  1
46 1981180 Plug 3/8” G - NP ⌧ 1
47 180101 O-Ring Ø17.5x2 1
820361 Plug 1/2” G - Brass  1
48 960870 Plug 1/2” G - NP ⌧ 1
1381071 Pump head - Brass  1
49 1381070 Pump head - NP ⌧ 1
50 820150 Head bolt M8x70 (217 in/lbs) 8
60 1380320 Bearing 1
61 621170 Oil seal 1
62 1380220 O-Ring Ø72.75x1.78 1
Legend
Ø 18 Ø 18 Ø 18 Ø 18
For  For  For  For ⌧
RKV3.5G25 RKV4G30A RKA4.5G32 RKV5.5G40H
RKV3.5G30 RKV4G30 RKV4.5G40H
RKV4G36
RKV4G37
For  For  For 
RKV4G32 RKV3.5G35H RKV4G35H
RKV3.5G40H RKV4G40H